Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin reflection across the y-axis followed by a rotation 90° clockwise about the origin reflection across the x-axis followed by a reflection across the y-axis reflection across the line y = x rotation 180° clockwise about the origin followed by a reflection across the line y = -x